3D Printing. Soluble Cores and Forms.

3D Printed soluble material. SR30  ST130

3D Printing in soluble materials.

Some lateral thinking has enabled the use of soluble materials to 3d print soluble cores for use composite and carbon fibre manufacture.  A second application is the 3d printing of soluble forms, applications for which include fabricating electrical coils.

The SR-30 support material is the most commonly used soluble material and is 3d printed using the FDM process.  This is to be supplimented by a new material, ST130 which has just launched.  ST130 has been specifically developed for this application.

Cores and Forms which Dissolve Away

3D Printing sacrificial Tools, Forms and Cores which are dissolved away after opens up innovative design opportunities with complex and hollow parts.

Soluble cores mean that hollow parts can be manufactured in one piece without a bonded seam. It's especially useful for fragile parts as it's removed 'hands free' minimising any stress on the new part.

The process is fast, reducing the time from design to manufacture compared to traditional manufacturing, while the resulting tooling is durable, able to withstand the lay up process.

SR30 and ST130 Soluble materials

SR30 is the original soluble material with a temperature resistance of 93°C (200 °F) and is printed in 0.256 layers.

ST130 is a new soluble material and has been specifically designed and engineered for sacrificial composite tooling manufacture. ST130 has a better temperature resistance at 130°C   Build layers are slightly thicker than the SR30 at 0.33mm

Both materials are 3D Printed with a choice of interior matrix style fill patterns to give your parts the the optimum strength verses the time required to dissolve. SR30 and ST130 is dissolved away using a weak sodium hydroxide solution heated to 70°C.

Ultem. A High temperature tooling material. 

If you are making tools, cores and moulds, Ultem 1010 is an excellent material choice where you need to manufacture reusable, high temperature moulds, tooling or Mandrels. Ultem 1010 is also autoclave compatible, see the page here:  read more...

Soluble form for coil manufacture.

A custom electrical coil manufactured with a 3d printed soluble form.

SR30 and ST130 Properties


  • Cure up to 121 °C with no pressure (ST130)
  • Cure up to 98 °C at 90 psi pressue (ST130)


  • Cure up to 93 °C upto 50 psi
  • CTE:11.7E-5 mm/(mm- ̊C)


  • Dissolved in a weak sodium hydroxide solution.
  • Default print of 0.254 (254 Micron) layers.
  • Build volume - Maximum: 406 x 355 x 406mm


Example objects printed with our 3d printing services:

3d printing service - example of work.
Metal 3d printing service - example of work.


What our customers say about our 3d printing service

"I am extremely pleased with the product and experience with 3Dalchemy. The entire process from CAD development to the end product was efficient. I am very happy with the end result! Thank you 3D alchemy for providing us with a great solution! "

Zela - Genetics Research.

What our customers say about our 3d printing service

"Thanks for pushing the order through in time. We were happy with the parts and the dimensional accuracy was very good in the vertical direction which isnt always the case with SLS."

Chris, Senior Design Engineer.

June 2017



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